Process for forming tubes.



J. R. HARBEGK. 1 PROCESS FOR FORMING TUBES. l

APPLICATION TILED MAR.'5, 190a.

Patented Sept. 9,1913.

@TATS JERVIS 12-. HARBECK, or nnrnorr, MICHIGAN, ASSIGNOR, BY MESNE nsslerrnumurs TO DETROIT CAN COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF NEW JERSEY.

To (ZZZ 41:71.0777n1'l'mc7g concern:

Be it known that I, Jrnvis R. HARBECK,

a citizen of the United States, and :a resi-.

dent of Detroit, in the county of Wayne and State of Michigan, have invented a new and useful Process for Forming Tubes,.

of which the following is a specification. r My invention relatesto the manufacture of tubes from fibrous material, andits ob-- ject is the economical production of tubes of non-circular cross-section such assqua-r'e,

triangular or any other design not easily produced directly by winding.

' My invention consists in a process 'comprising the winding of approximately cylindrical tubes, and while such tubes are in plastic, non-resilient condition, forming them to the desired cross section, and then permitting them to harden.

a While this process may be carried out'in connection with presses and molds, it is rapidly and easily carried'out by means of such machines as are illustrated in the ac-' companying drawing, in which- Figure 1 is a side view of a plurality-of sets of rolls adapted for forming tubes recp tangular in cross section. Fig. 2 is an end view of thelast set of these rolls. .Fig. 3 is an end view of a set of rolls adapted for forming tubes triangular in cross section.

Similar reference characters refer to like.

wind container bodies of various cross sections on the proper mandrels, I have found that a larger number of bodies can be produced by first winding the tube material into tubes on a continuous tube machine and then cutting the long lengths into container bodies. But forming non-cylindrical tubes continuously has hitherto not.been accomplished.

, My present invention has for its object the chan ing of the cross section of cylindrical tu es to that of any of the desired forms.

In the drawings, 1 is a base to which are secured a number of frames 2, in which are jom-nalcd the rollers 3,. geared to ether by means of the piuions 4. These ro lers may be driven by means of the sprocket chain 5 and sprocket wheels 0 from any source of ft tube 7, still moist and soft from the winding machine is introduced and passed Specification of Letters Patent.

p g y 1 PatentedSept.9, ,-1913.r Application filed March 6, 13,08. Serial No. 419,277. I V

I through between the different sets of rolls,

being first but slightly flattened,-each succeeding set continuing the action, until the tube as it comes from the last set of rolls has the desired cross section. .The number of sets of rolls will depend .upon the thickness ofv the tubing and upon. the material. After the tubes have been formed, they are stored until the cement becomes dry and the .tubes'resilient. They may then be cut into proper lengths and if to be used for con tamer bodies, heads are attached.

The cylindrical tubes must be operated upon through 'this process while they are still plastic and non-resilient, that is, before the cement employed to hold the several layers together has had time to harden.

Where triangular tubes are desired, aplurality of sets of rolls such as shown in Fig.

3 may. be employed, comprising a frame 11,-

rolls 12 geared together-by pinions 13 and driven by the. sprocket wheel 14. Any other combination of rolls or devices may be employed to produce any desired cross section. All that is necessary to carry out this process are tubes that are plastic and non-re silient, and means to give the tubes th de sired form. The tubes must be perm ted to become hard before being handled sufiiciently to change the new form.

. Having now described my process, what I claim as my invention and desire to secure by Letters Patent is i 1. The process of making tubes of fibrous material of any desired cross section, which consgts in winding moist, plastic, non-resilienttubes of such cross section as may be easily produced, then subjecting the hollow tubes to external pressure on all sides of the center and changing the cross section by means of successive sets of rolls to that desired while the. tubes are still plastic and non-resilient, and then permitting the tubes to dry out and harden.

2. The process of forming tubes, which consists in winding soft, cement-coated fibrous material into approximately cylindrical tubes, then subjecting thehollow tubes to external ressure on all sides: of the center and c singing the cross section of the tubes before the material becomes dry and non-plastic, and then permitting the tube to harden.

material of any desired cross section, which the centerto change the cross section of the harden.

consists of re-forniing cement-coated plastic, cross section ofthetubes, then changing the non-resilient tubes subjecting the hollow cross section of such tubes While still nontubes to external pressure on all sides of resilient and then permitting: them to tubes and then permitting them to harden. In testinibrijwhereofilh have signed this 4. The process ofmalging tubes of fibrous specification in the presence of two sub-, material of any-desired cross section which scribing witnesses.

consists of winding cement-coated fibrous JERVIS R, HARBEK material into plastic, non-resilient tubes sub- Witn'esses: jecting the hollow tubes to external pressure EDWARD N. PAoELsEN, on all sides of. the center to change the ELIzAnETH M. BROWN.

Copies of this patentlmay-be obtained for five cents each, by addressing the Commissioner of Patents.

Washington; D. (2.? v 1 

